What simple things do you do to make trail cooking easier / simpler / tastier / less messy / etc? Nothing fancy, just the simple stuff. I'll start.
Carry single serving mayonnaise packets. Use them where your recipes call for fats like butter or oil. Easy clean up, no oil bottle spillage.
Use a small square of plastic to scrape the sides and bottom of your cookpot or bowl. Gets out a lot more food than a spoon, make clean up easier.